有错误，＆＃39; xxx / xxx.h＆＃39; pod lib lint时找不到文件

Question

这是一个简单的规范

#
# Be sure to run `pod lib lint test.podspec' to ensure this is a
# valid spec before submitting.
#
# Any lines starting with a # are optional, but their use is encouraged
# To learn more about a Podspec see http://guides.cocoapods.org/syntax/podspec.html
#

Pod::Spec.new do |s|
  s.name             = 'test'
  s.version          = '0.1.0'
  s.summary          = 'A short description of test.'

# This description is used to generate tags and improve search results.
#   * Think: What does it do? Why did you write it? What is the focus?
#   * Try to keep it short, snappy and to the point.
#   * Write the description between the DESC delimiters below.
#   * Finally, don't worry about the indent, CocoaPods strips it!

  s.description      = <<-DESC
TODO: Add long description of the pod here.
                   DESC

  s.homepage         = 'https://github.com/vincentgemini/test'
  # s.screenshots     = 'www.example.com/screenshots_1', 'www.example.com/screenshots_2'
  s.license          = { :type => 'MIT', :file => 'LICENSE' }
  s.author           = { 'vincentgemini' => 'vincent_gemini@163.com' }
  s.source           = { :git => 'https://github.com/vincentgemini/test.git', :tag => s.version.to_s }
  # s.social_media_url = 'https://twitter.com/<TWITTER_USERNAME>'

  s.ios.deployment_target = '8.0'

  s.source_files = 'test/Classes/**/*'
  s.vendored_libraries = 'test/Module/**/*.a' 

  # s.resource_bundles = {
  #   'test' => ['test/Assets/*.png']
  # }

  # s.public_header_files = 'Pod/Classes/**/*.h'
  # s.frameworks = 'UIKit', 'MapKit'
  # s.dependency 'AFNetworking', '~> 2.3'
end

文件夹树是

test
├── Assets
├── Classes
│   ├── ViewController.h
│   └── ViewController.m
└── Module
    ├── include
    │   └── MMM
    │       └── MMM.h
    └── libMMM.a

但是当pod lib lint时，有一个错误/Users/gemini_mxz/Desktop/test/test/Classes/ViewController.m:11:9：致命错误：＆＃39; MMM / MMM.h＆＃39;文件未找到。

ViewController.m是

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

    MMM *m = [[MMM alloc] init];
    NSLog(@"%@", a);
}

我尝试使用preserve_paths或xcconfig，但错误仍然存​​在。